Question 1103341
1/k+1/w=1/x
k=w*0.5
1/w*0.5+1/w=1/5
1/w*0.5+0.5/0.5*w=1/5
1.5/w*0.5=1/5
0.5*w=7.5
w=15.0
k=15*0.5
k=7.5 w=15
check
1/k+1/w=1/x
1/7.5+1/15=1/5
0.13333333+0.66666667e-1=1/5
0.2=1/5
0.2=0.2
x=5 hours working together
k=7.5 hours working alone
w=15 hours working alone
ok